Method of forming drawing-rolls for spinning-machines.



I E. KEMPSHALL. METHOD OF FORMING DRAWING ROLLS FOR SPINNING MACHINES. APPLICATION FILED APR. 29, 1913.

1,074,590. Patented Sept. 30 1913.

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ELEAZER KEMPSHALL, 0F' 1\TEW YORK, N. Y., ASSIG-NOB- T0 KEMPSHALL SUPPLY COMPANY, CORPORATION OF NEW JERSEY.

METHOD OF FORMING DRAWING-ROLLS FOR SPINNING-MACHINES.

Specification of Letters Patent.

Patented Sept. 30, 1913.

Original application filed March 3, 1913, Serial No. 751,893. Divided and this application filed April 29,

lowing to be a full, clear, and exact description of the invention, such as will enablev others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in the method of forming drawing rolls for spinning machines.

The object .of the invention is to provide a simple and economical method of forming a drawing roll, so that a roll may be covered without requiring a great loss of Humor oxpensive special machincry for equipping a roll with a cot.

Heretofore it has been custon'iary to form a coating of rubber on a hard core, and then roll a sheet of leather on the rubber, or others have vulcanized the rubber on the core, and then in various ways have placed the covering over the rubber.

In my pending application for patent, Serial No. 751,893, filed March 3, 1913, I have described a cot for a roll, this cot being employed in carrying out the method described in this application.

According to the invention I employ a soft rubber tube, and a tubular leather cover, the interior diameter of which is slightly less than the exterior diameter of the rubber tube, and then slide the tube and cover over ahard core which is slightly larger in diameter than the interior diameter, of the rubber tube. In this way the cot is held in position because of the rubber be ing compressed between the leather cover and the hard core.

Serial No. 764,395.

In the drawing: Figure 1 is a perspective view of a strip of leather, from which an endless cover is formed. Fig. 2 is a separated view of the cover, rubber tube, and hard core. Fig. 3 is a view of the roll, equipped with a cot.

1 indicates a leather cover, 2 a vulcanized soft-rubber tube, the exterior diameter of which is greater than the interior diameter of the leather cover.

3 indicates a hardcore, on which the cot is placed.

In carrying out my method, I bend or crease the rubber sleeve, andslip same in the leather cover, and then permit the rubber to expand to frictionally engage with said cover. The outward compression of the rubber causes a binding action between the two elements, which results in the thin leather covering fitting the leather tightly and forming a smooth surface. After the leather and sleeve have been tilted to each other to form a complete cot, the latter is drawn over the hard core, which, being greater in diameter than the interior diameter of the sleeve, compresses the rubber between the cover and said hard core, and materially increases the density of the rubber. The differences in diameter creates friction between the partsQaud therefore the cot is firmly held inposition. Of course, if it should be found necessary, I may iron the edges of the cot.

By my improved method, I produce a convenient and practical manner of forming a drawing roll, and one which can be handled by inexperienced help.

Having thus described my intention, what I claim is: V i

The herein described method of umnufacturiug a drawing roll consisting in forming a covering from a thin llat strip of leather, then forming a rubber tube of slightly greater diameter than the leather covering, and inserting the tube in the covering by bending or creasing said tube, and then expanding the tube, then drawing the comthat the said tube Will be held'frictionally and the entire cot Will be firmly secured on pleted cot over a hard core of slightly name to this specification in the presence of greater diameter than the rubber tube, so two subscribing Witnesses.

ELEAZER KEMPSHALL.

and in a compressed state on the said core,

the core.

In testimony whereof I have signed my 

